B5 Communicable diseases Flashcards
1
Q
How are diseases spread
A
by air
by water
by contact
by vector
2
Q
what viral disease effects plants
A
tobacco mosaic virus
3
Q
what does tobacco mosaic virus do to a plant
A
causes a mosaic pattern on leaves of plants as cells die
photosynthesis slows down causing plant disease
4
Q
how does tobacco mosaic virus transmit to other plants
A
direct contact between plants.
insects can act as vectors
5
Q
how is tobacco mosaic virus treated
A
no cure, field hygiene and pest control can prevent transmission. gm crops can be resistant to tmv
